Stir-in form of pigment

Abstract

Disclosed is a composition and process of manufacture of a stir-in form of pigment with increased dispersing and color properties. Pigment is slurried with acetylenic dispersing agents, wet-milled to a particular particle size, and then dried to powder or granulate form. Also disclosed is a process for producing a pigmented paint composition from the stir-in pigment.

1. A pigment powder composition comprising a wet milled combination of organic pigment, water, and acetylenic surfactant, which has been dried to a powder and wherein the surfactant is about 5 to 40% of the powder. 
     
     
       2. The pigment powder composition of  claim 1 , wherein the pigment is about 60% to 95% of the powder. 
     
     
       3. The pigment powder composition of  claim 2 , wherein the surfactant is about 5 to 40% of the powder. 
     
     
       4. The pigment powder composition of  claim 1 , wherein the pigment is selected from the group consisting of Pigment Blue 15:0, 15:1, 15:2, 15:3, 15:4, Pigment Green 7, Pigment Red 112, Pigment Red 122, Pigment Red 202, Pigment Violet 19, Pigment Violet 23, Pigment Red 188, Pigment Yellow 74, and Pigment Yellow 73. 
     
     
       5. The pigment powder composition of  claim 4 , wherein the pigment is a Pigment Red. 
     
     
       6. The pigment powder composition of  claim 4 , wherein the pigment is Pigment Red 122. 
     
     
       7. The pigment powder composition of  claim 4 , wherein the pigment is a Pigment Blue. 
     
     
       8. A paint composition comprising a pigment powder composition and a paint base, wherein the pigment powder composition comprises a wet milled combination of pigment, water, and acetylenic surfactant, which has been dried to a powder. 
     
     
       9. The paint composition of  claim 8 , wherein the paint base comprises at least one of water, an extender, a humectant, and a second surfactant, wherein the second surfactant is selected from the group consisting of anionic, nonionic, cationic, amphoteric surfactants, and mixtures thereof. 
     
     
       10. The paint composition of  claim 9 , wherein the anionic surfactant is selected from the group consisting of phosphate esters, carboxylic acids, sulfonates, sulfates mixture thereof. 
     
     
       11. The paint composition of  claim 9 , wherein the nonionic surfactant is selected from the group consisting of acetylenic surfactant, alkyl phenol ethoxylates/propoxylates, EO/PO block copolymers, alcohol ethoxylates, esters, or mixture thereof. 
     
     
       12. The paint composition of  claim 9 , wherein the cationic surfactant is selected from the group consisting of primary, secondary, tertiary and quaternary amines, imides, or mixture thereof. 
     
     
       13. The paint composition of  claim 9 , wherein the surfactant second is a natural surfactant selected from the group consisting of lecithin, fatty acids, glucamides, glycerides, polysaccharides, or mixture thereof. 
     
     
       14. The paint composition of  claim 9 , wherein the selected surfactant is about 5 to 25% of the composition. 
     
     
       15. The paint composition of  claim 9 , wherein the extender is selected from the group consisting of talc, clay, mica, calcium carbonate, silica, silicates and sulfates, and mixtures thereof. 
     
     
       16. The composition of  claim 9 , wherein the extender is 7 to 40% of the composition. 
     
     
       17. The paint composition of  claim 9 , wherein the humectant is selected from the group consisting of propylene glycol, ethylene glycol, sorbitol, glycerin, and mixtures thereof. 
     
     
       18. The paint composition of  claim 9 , wherein the humectant is 7 to 30% of the composition. 
     
     
       19. The paint composition of  claim 8 , further comprising at least one member selected from the group consisting of biocide, defoamer, flow aid, and leveling aid. 
     
     
       20. A method of forming a pigment powder comprising:
 providing a mixture of pigment, milling liquid, and acetylenic surfactant, 
 wet milling the mixture, and 
 drying the milled mixture. 
 
     
     
       21. The method of  claim 20 , wherein the pigment is about 60% to 95% of the mixture. 
     
     
       22. The method of  claim 20 , wherein the acetylenic surfactant is about 5% to 40% of the mixture. 
     
     
       23. The method of  claim 20 , wherein the milling is media milling. 
     
     
       24. The method of  claim 23 , wherein the drying is spray drying. 
     
     
       25. The method of  claim 20 , wherein the drying is spray drying. 
     
     
       26. An article comprising a substrate having the paint composition of  claim 8  thereon.